The HBase cluster created in E-MapReduce allows you to use the snapshot feature integrated into HBase to back up HBase tables, and export the backup to OSS.

Example:

  1. Create an HBase cluster

    For more information, see Create clusters.

  2. Create a table
    >create 'test','cf'
  3. Add data
    > put 'test','a','cf:c1',1
> put 'test','a','cf:c2',2
> put 'test','b','cf:c1',3
> put 'test','b','cf:c2',4
> put 'test','c','cf:c1',5
> put 'test','c','cf:c2',6
  4. Create a snapshot
    hbase snapshot create -n test_snapshot -t test
    List snapshots
    >list_snapshots
SNAPSHOT                TABLE + CREATION TIME
 test_snapshot          test (Sun Sep 04 20:31:00 +0800 2016)
1 row(s) in 0.2080 seconds
  5. Export the snapshot to OSS.
    hbase org.apache.hadoop.hbase.snapshot.ExportSnapshot -snapshot test_snapshot -copy-to oss://$accessKeyId:$accessKeySecret@$bucket.oss-cn-hangzhou-internal.aliyuncs.com/hbase/snapshot/test
    Note Access OSS using internal endpoints.
  6. Create another HBase cluster
  7. Export snapshots from OSS
    hbase org.apache.hadoop.hbase.snapshot.ExportSnapshot -snapshot test_snapshot -copy-from oss://$accessKeyId:$accessKeySecret@$bucket.oss-cn-hangzhou-internal.aliyuncs.com/hbase/snapshot/test -copy-to /hbase/
  8. Restore data from snapshots
    >restore _snapshot 'test_snapshot'
    >scan 'test'
ROW                     COLUMN+CELL
 a                      column=cf:c1, timestamp=1472992081375, value=1
 a                      column=cf:c2, timestamp=1472992090434, value=2
 b                      column=cf:c1, timestamp=1472992104339, value=3
 b                      column=cf:c2, timestamp=1472992099611, value=4
 c                      column=cf:c1, timestamp=1472992112657, value=5
 c                      column=cf:c2, timestamp=1472992118964, value=6
3 row(s) in 0.0540 seconds
  9. Create new tables from snapshots
    >clone_snapshot 'test_snapshot','test_2'
    >scan 'test_2'
ROW                     COLUMN+CELL
 a                      column=cf:c1, timestamp=1472992081375, value=1
 a                      column=cf:c2, timestamp=1472992090434, value=2
 b                      column=cf:c1, timestamp=1472992104339, value=3
 b                      column=cf:c2, timestamp=1472992099611, value=4
 c                      column=cf:c1, timestamp=1472992112657, value=5
 c                      column=cf:c2, timestamp=1472992118964, value=6
3 row(s) in 0.0540 seconds